Our IT person says it has to do with the print driver and that this is
normal.
Your IT person is correct. The same thing would happen if you switch between an ink jet printer and a laser printer when printing from Word. It has nothing to do with Acrobat or PDF. To maintain the look you want, select the Acrobat Distiller printer in Word then do a print preview. Adjust margins and layout in Word as you like, THEN make the PDF.